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Connection of stand-alone option units
2.5.4 Connection of the brake unit (BU type)
Connect the brake unit (BU type) correctly as shown below. Incorrect connection will damage the inverter. Remove the
jumper across terminals HB-PC and terminals TB-HC of the brake unit and fit it across terminals PC-TB.
2.5.5 Connection of the high power factor converter (FR-HC/MT-HC)
When connecting the high power factor converter (FR-HC/MT-HC) to suppress power harmonics, perform wiring
securely as shown below.
Incorrect connection will damage the high power factor converter and inverter.
(1) Connection with the FR-HC (55K or lower)
After making sure the wiring is correct, set the following parameters.
Pr. 19 Base frequency voltage (under V/F control) or Pr. 83 Rated motor voltage (under a control method other than V/F
control) = "rated motor voltage"
Pr. 30 Regenerative function selection = "2"
*1 When the power supply is 400V class, install a step-down transformer.
*2 For capacity 7.5K or lower, remove the jumper across terminals PR and PX.
CAUTION
⋅ The wiring distance between the inverter, brake unit and resistor unit should be within 2m. If twisted wires are used, the
distance should be within 5m.
⋅ If the transistors in the brake unit should become faulty, the resistor can be unusually hot, causing a fire. Therefore, install a
magnetic contactor on the inverter's power supply side to configure a circuit so that a current is shut off in case of fault.
⋅ Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
*1 Remove the jumpers across the inverter terminals R/L1 and R1/L11, S/L2 and S1/L21, and connect the control circuit power supply to the R1/L11
and S1/L21 terminals. Always keep the power input terminals R/L1, S/L2, T/L3 open. Incorrect connection will damage the inverter. (E.OPT
(option alarm) will occur. (Refer to page 412.))
*2 Do not insert the MCCB between terminals P/+ and N/- (P/+ and P/+, N/- and N/-). Opposite polarity of terminals N/-, P/+ will damage the inverter.
*3 Use Pr. 178 to Pr. 189 (input terminal function selection) to assign the terminals used for the X10 (X11) signal. (Refer to page 231)
For communication where the start command is sent only once, e.g. RS-485 communication operation, use the X11 signal when making setting to
hold the mode at occurrence of an instantaneous power failure. (Refer to page 209.)
*4 Always connect the terminal RDY (of FR-HC) to a terminal where the X10 or MRS signal is assigned in the inverter. Always connect the terminal
SE (of FR-HC) to the terminal SD (of the inverter). Not doing so may damage FR-HC.
CAUTION
⋅ The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
⋅ Use sink logic (factory setting) when the FR-HC is connected. The FR-HC cannot be connected when source logic is selected.
⋅ Do not connect a DC reactor to the inverter when FR-HC is connected.
⋅ Do not remove the jumper across P/+ and P1.
U
V
W
IM
Brake unit
(BU type)
Discharging
resistor
R/L1
S/L2
T/L3
N/-
P/+
MC
P
PR
OCR
N
Remove the
jumper
Fit a jumper
HC
HB
HA
TB
OCR
PC
MC
OFFON
MC
T*1
Three-phase
A
C power
supply
MCCB
Inverter
Motor
PR
PX
*2
Outside box
Reactor1
Inverter
Power
supply
MCCB
High power factor converter
(FR-HC)
(FR-HCB)
Reactor2
(FR-HCL02)
R/L1
(FR-HCL01)
phase
detection
S/L2
T/L3
P/+
N/-
X11
*3
X10
*3
RES
U
V
W
P
N
Y1orY2
RDY
RSO
MC1
MC2
R4
S4
T4
R
S
T
R4
S4
T4
R3
S3
T3
R3
S3
T3
R2
S2
T2
R2
S2
T2
R
S
T
MC1
MC2
SDSE
R1/L11
S1/L21
MC
*1
*4
*1
*2
Moto
r
IM